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authorChristoph Hellwig <hch@lst.de>2014-04-15 14:14:00 -0600
committerJens Axboe <axboe@fb.com>2014-04-15 14:18:02 -0600
commit24d2f90309b23f2cfe016b2aebc5f0d6e01c57fd (patch)
tree10307829129eb8f96facbb89fefbba3c0032fb46 /block/blk-mq-tag.c
parented44832dea8a74f909e0187f350201402927f5e5 (diff)
downloadkernel-24d2f90309b23f2cfe016b2aebc5f0d6e01c57fd.tar.gz
blk-mq: split out tag initialization, support shared tags
Add a new blk_mq_tag_set structure that gets set up before we initialize the queue. A single blk_mq_tag_set structure can be shared by multiple queues. Signed-off-by: Christoph Hellwig <hch@lst.de> Modular export of blk_mq_{alloc,free}_tagset added by me. Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-tag.c')
-rw-r--r--block/blk-mq-tag.c14
1 files changed, 0 insertions, 14 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 83ae96c51a27..7a799c46c32d 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -1,25 +1,11 @@
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/percpu_ida.h>
#include <linux/blk-mq.h>
#include "blk.h"
#include "blk-mq.h"
#include "blk-mq-tag.h"
-/*
- * Per tagged queue (tag address space) map
- */
-struct blk_mq_tags {
- unsigned int nr_tags;
- unsigned int nr_reserved_tags;
- unsigned int nr_batch_move;
- unsigned int nr_max_cache;
-
- struct percpu_ida free_tags;
- struct percpu_ida reserved_tags;
-};
-
void blk_mq_wait_for_tags(struct blk_mq_tags *tags)
{
int tag = blk_mq_get_tag(tags, __GFP_WAIT, false);